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S7-400
Addressing the S7-400
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3-1
AutomationSystem S7-400
Hardwareand Installation
A5E00850741-01
Addressing the S7-400
Chapter Overview
Section
Description
Page
3.1
Geographical and Logical Addresses
3-2
3.2
How to Determine the Default Address of a Module
3-4
3.3
How to Determine the Default Address of a Channel
3-6
3
Contents
Main
!
Caution
Notice
Qualified Personnel
Prescribed Usage
!
Trademarks
Safety Guidelines
Preface
Navigating
Recycling and Disposal
Further Support
TrainingCenters
TechnicalSupport
Service & Support on the Internet
Page
Contents
Page
Page
Page
Page
Page
Product Overview
Overview of the S7-400
Features of the S7-400
Product Overview
1-2
S7-400 components
The most important components of the S7-400 and their functions are given in the following tables:
Location of the order number and product version
Page
2-1
Installing the S7-400
2.1 S7-400 Installation
Central Rack (CR) and Expansion Rack (ER)
Connecting the CR and ER(s)
Connecting witha5VSupply
Overview of the Connections
2-4
Ways of Connecting Central and Expansion Racks
Rules for Connection
2-6
2.2 Installing the Central Rack (CR) and Expansion Rack (ER)
Function of the Racks
Racks in the S7-400 System
Electrical Supply
I/O Bus
Communication Bus (C Bus)
Rack with I/O Bus and Communication Bus
2.3 Segmented CR
Properties
2.4 Subdivided CR
Characteristics
2.5 Mounting and Grounding the Racks
Important Notes on Installation
Step 1: Retaining Distances Between Devices
Space Required When Using Cable Channels and Fan Subassemblies
Dimensions of the Racks
Step 2: Mounting the Rack
2-13
Mounting Screws
Youhave a choice of the following types of screw for securing a rack:
Step 3: Connecting the Rack to the Chassis Ground
Step 4: Mounting Additional Racks
Page
2.6 Chassis Terminal Connection in the Non-Isolated Configuration
Reference Point
Connection to the Reference Point
2.7 Methods of Ventilation
Methods of Ventilation
Page
2.8 Changing the Ventilation with the Cable Duct and Fan Subassembly
Changing the Ventilation
Shipping state
Filter Mat (Optional)
2.9 Installing the Fan Subassembly
Monitoring the Fan Subassembly
2.10 Installing the Cable Duct
2.11 Choosing and Setting up Cabinets with the S7-400
Why Cabinets are Required
Typesand Dimensions of Cabinets
2-26
Removable Power Dissipation from Cabinets (Example)
Example of selecting the cabinet type
Cabinet dimensions
2.12 Rules for the Arrangement of Modules
Arrangement of the Modules
Space Requirement of the Racks
2.13 Installing Modules in a Rack
Tool
Installation Sequence
Removing the Cover
Attaching the Modules
Screwing the Modules in Place
2.14 Marking the Modules with Slot Labels
Slot Number
Fitting Slot Labels
2.15 Methods of Expansion and Networking
Distributed I/Os
Networking
2-35
2.16 Accessories
Accessories
Page
3-1
Addressing the S7-400
3.1 Geographical and Logical Addresses
Addresses
Geographical Addresses
Logical Addresses
The TwoStages of Addressing
Default Addressing
Conditions for Default Addressing
3.2 How to Determine the Default Address of a Module
Default Addressing
Default Addresses of Digital Modules
Page
3.3 How to Determine the Default Address of a Channel
Channel on a Digital Module
Channel on an Analog Module
Page
4-1
Wiring the S7-400
4.1 Supplying Power to Modules
Power Supply Modules and Load Current Power Supplies
4.2 Choosing the Power Supply Module
Estimating the Power Requirement
Calculation Example
4.3 Choosing the Load Current Power Supply
Choosing the Load Current Power Supply
Load Current Power Supplies
Determining the Load Current
4.4 Assembling an S7-400 with Process I/Os
Definition of a Grounded Supply (TN-S Network)
Components and Protective Measures
Rule: Grounding the Load Current Circuits
S7-400 in the Overall Installation
4.5 Assembling an S7-400 with Grounded Reference Potential (M)
Discharge of Interference Currents
TerminalConnection Model
4.6 Assembling an S7-400 with Ungrounded Reference Potential (Ungrounded Configuration)
Discharge of Interference Currents
TerminalConnection Model
Power Supply Units
Page
4.7 Assembling an S7-400 with Isolated Modules
Definition
Isolated Modules and Grounding Concept
Configuration with Isolated Modules
4.8 Parallel Wiring of Digital S7-400 Outputs
Parallel Wiring of a Digital Output with Different Rated Load Voltages
Parallel Wiring of a Digital Output with Identical Rated Load Voltages
4.9 Grounding
Ground Connections
Protective Ground
Connecting the Load VoltageGround
4.10 Interference-Free Configuration for Local and Remote Connections
Use only Approved Components
Interference-Free Configuration for Local Connections
Interference-Free Configuration for Remote Connections
Special Cases
Wiring the S7-400
4-17
4.11 Wiring Rules
Lines and Tools
For wiring the S7-400 modules, there are some rules for the cables and tools to use.
4.12 Wiring the Power Supply Module
Power Supply Connector
Disconnecting the Power Supply Connector
Wiring the Power Supply Connector
Page
Plugging In the Power Supply Connector
4.13 Wiring the Signal Modules
The Three Typesof Front Connector
Preparing to Wire the Front Connector
4.14 Wiring the Front Connector, Crimping
4.15 Wiring the Front Connector, Screw Terminals
4.16 Wiring the Front Connector, Spring-TypeTerminals
Principle of the spring loaded terminal
4.17 Fitting the Strain Relief
Cable Ties as Strain Relief
4.18 Labeling a Front Connector
Labels and TerminalDiagram
Labels
Notes on Ordering Labeling Sheets for S7-400
How to Label S7-400 Modules
4.19 Fitting the Front Connector
Principle of a Coding Key
Front Connector Coding on the Signal Modules
Plugging In the Front Connector
Page
Page
4.20 Interconnecting the CR and ER(s)
Interconnecting the Interface Modules
Page
4.21 Setting the Fan Subassembly to the Line Voltage and Wiring It
Setting the Fan Subassembly to the Line Voltage
Fuse
Wiring the Fan Subassembly
4.22 Cable routing in cable ducts or fan subassemblies
Cable Routing
Securing Cables
Shield Contact
4.23 Routing Fiber-Optic Cables
Networking
5.1 Configuring a Network
Subnets
Same Configuration
Multipoint Interface (MPI)
Configuring Communication
5.2 Fundamentals
Station = Node
Segment
Baud Rate
Connectable Nodes
Number of Nodes
MPI/PROFIBUS-DP Addresses
Default MPI Addresses
Rules for MPI Addresses
PG / OP --Module communication without MPI
Maximum Number of Connections via MPI
PG Access
5.3 Rules for Configuring a Network
Rules
Data Packets in the MPI Network
Recommendation for MPI Addresses
Recommendation for PROFIBUS-DP Addresses
Components
5-9
TerminatingResistor on the Bus Connector
TerminatingResistor on the RS 485 Repeater
Example: TerminatingResistor in the MPI Network
5-11
Example of an MPI Network
5-12
Example of a PROFIBUS-DP Network
Example Using a CPU 414-2
Programming Device Access Beyond Network Limits (Routing)
5.4 Cable Lengths
Segment in the MPI Network
Segment in the PROFIBUS-DP Network
Longer Cable Lengths
Lengths of Spur Lines
5-17
5.5 PROFIBUS-DP Bus Cables
PROFIBUS-DP Bus Cables
Characteristics of the PROFIBUS-DP Bus Cable
Rules for Laying Cables
5.6 Bus Connectors
Purpose of the Bus Connector
Appearance (6ES7972-0B.20 ...)
Connecting Bus Cables to Bus Connectors (
Connecting the Bus Connector
Removing the Bus Connector
5.7 RS 485 Repeater / Diagnostics Repeater
5.8 PROFIBUS-DP Network with Fiber-Optic Cables
Electrical/Optical Conversion
Benefits and Areas of Application
Optical PROFIBUS-DP Network in Partyline Topology
TransmissionRate
5-24
PROFIBUS Optical Bus Terminal(OBT)
5.8.1 Fiber-Optic Cables
Features of the Fiber-Optic Cables
Use Siemens plastic and PCF fiber-optic cables with the following features:
5.8.2 Simplex Connectors and Connector Adapter
Definition
Prerequisite
Structure
Order Numbers
5.8.3 Connecting a Fiber-Optic Cable to the PROFIBUS Device
Cable Lengths
Mixed Use of Plastic Fiber-Optic and PCF Fiber-Optic Cable
Laying PCF Fiber-Optic Cable
Laying Plastic Fiber-Optic Cable
Installation Instructions for Plastic Fiber-Optic Cable (with Photos)
Rules for Laying Cable
Installing the Connector Adapter
Page
6-1
Commissioning
6.1 Recommended Procedure for First Startup
Recommended Procedure
How to Proceed in the Case of an Error
Commissioning
6-3
6.2 Checks Prior to Switching On for the First Time
Checks Prior to Switching On for the First Time
Commissioning
6-4
6.3 Connecting a Programming Device (PG) to an S7-400
Connecting a Programming Device (PG) to an S7-400
Communication between Programming Device and CPU
Operator Control
6.4 Switching On an S7-400 for the First Time
Switching On an S7-400 for the First Time
Switching On an H System for the First Time
6.5 Resetting the CPU with the Mode Selector Switch
How to Carry Out a Memory Reset
When Should a CPU be Reset?
How to Perform a Memory Reset
Resetting the CPU with the Mode Selector Switch
What Happens in the CPU During a Memory Reset
What Remains Following the Memory Reset...
Special Case MPI Parameters
6.6 Cold, Warm, and Hot Restarts with the Mode Selector Switch
Restart (warm start)
Hot restart
Control sequence for restart (warm restart) / hot restart
6.7 Inserting a Memory Card
The Memory Card as Load Memory
What Typeof Memory Card Should You Use?
Inserting a Memory Card
6.8 Inserting a Backup Battery (Option)
Backup
Inserting a Backup Battery
Page
Page
Reducing the Passivation Layer
Removing a Backup Battery
6.9 Starting Up a PROFIBUS-DP Subnet
Requirements
Starting Up
Behavior of the CPU During Startup
6.10 Installing Interface Modules (CPU 414-2, 414-3, 416-3, 417-4 and 417-4H)
Available Interface Modules
Installing Interface Modules
Covering Unused Submodule Slots
Page
7-1
Maintenance
7.1 Replacing the Backup Battery
Replacing the Backup Battery
Using Backup Batteries
Rules for the Care of Backup Batteries
7.2 Replacing a Power Supply Module
Removing the Module (Ignore Steps 1 and 2 When Using Redundant Power Supply Modules)
7.3 Replacing CPUs
Saving the Data
Removing the Module
Page
7.4 Replacing Digital or Analog Modules
Installing a Module
Removing the Front Connector Coding Key
Exchanging the Front Connector
7.5 Changing the Fuses in the Digital Modules
!
Modules with Fuses
Check the Plant
Changing the Fuses
How the S7-400 Behaves after Replacing the Fuse
7.6 Replacing Interface Modules
Hot--swappingModules
Removing Modules / Exchanging Cables
Page
7.7 Replacing the Fuse of the Fan Subassembly
Fuse Type
Replacing the Fuse
7.8 Replacing Fans in the Fan Subassembly During Operation
Removing the Fans
Page
7.9 Replacing the Filter Frame of the Fan Subassembly During Operation
Replacing the Filter Frame
Page
7.10 Replacing the Power Supply PCB and Monitoring PCB of the Fan Subassembly
Exchanging the Mother Board
7.11 Replacing Interface Submodules
Available Interface Submodules
Installing Interface Submodules
A
A-1
Assembling and Installing Systems
A.1 General Rules and Regulations for Operating the S7-400
General Basic Rules
Specific Application
EMERGENCY OFF Devices
Reactions of the Plant after Certain Events
120/230 VACSupply
24 VDC Supply
The following table shows the points you must observe when connecting the S7-400 to a 24 VDC supply.
Protection Against External Electrical Effects
The following table shows what you must observe for protection against external electrical effects.
Protection Against Other Electrical Effects
A.2 Principles of System Installation for EMC
Definition: EMC
Possible Effects of Interference
Page
Five Basic Rules for Ensuring Electromagnetic Compatibility
Rule 1: Large Area Grounding
Rule 2: Correct Cable Routing
Rule 3: Secure Cable Shields
Rule 4: Special EMC Measures
Rule 5: Standard Reference Potential
See also
A.3 Installation of Programmable Controllers for EMC
Inactive Metal Parts
Grounding of Inactive Metal Parts During Installation
Ensure the following when chassis grounding:
A.4 Examples of EMC-Compatible Assembly
Example 1: Cabinet Configuration for EMC
Key for example 1
Example 2: EMC--compliantWall Mounting
Ensure the following for frame and wall mounting:
A.5 Shielding Cables
Purpose of the Shielding
Principle of Operation
Suitable Cables
Grounding the Cable Shields
Handling the Shields
A.6 Equipotential Bonding
Potential Differences
Equipotential Bonding Conductor
Page
A-17
A.7 Cabling Inside Buildings
How to Read the Table
A-18
A.8 Cabling Outside Buildings
A.9 Lightning Protection and Overvoltage Protection
Overview
A.9.1 Lightning Protection Zone Concept
Principle of the Lightning Protection Zone Concept According to IEC 61312-1/DIN VDE 0185 T103
Effects of a Lightning Strike
Surges
Diagram of the Lightning Protection Zones
Principle of Transitionsbetween the Lightning Protection Zones
A.9.2 Rules for the Transition between Lightning Protection Zones 0and1
Rule for the Transition0 < ->1 (Lightning Protection Equipotential Bonding)
Additional Measures
A-24
A.9.3 Rules for the Transitions between Lightning Protection Zones 1 <-> 2 and Greater
Rules for Transitions1 <-> 2 and Above (Local Equipotential Bonding)
).
Additional Measures
Lightning Protection Element for the 24 VDC Supply
Low-VoltageProtection Elements for 1 < --> 2
A-27
Low-VoltageProtection Elements for 2< --> 3
Page
A-29
Components in figure A-7
The table A-6 explains consecutive numbers in the figure A-7:
A.10 How to Protect Digital Output Modules against Inductive Surge
Inductive Surge Voltage
Integrated Surge Arrester
Additional Overvoltage Protection
Suppression for DC-Operated Coils
Suppression with Diodes / Zener Diodes
Suppression with AC-Operated Coils
A.11 Safety of Electronic Control Equipment
Intoduction
Reliability
Risks
Splitting the group into safety-relevant areas and areas which are not savety-relevant
Important Information
A.12 Interference-Free Connection of Monitors
Operation under Low-Interference Conditions
Operation under Industrial Conditions
Shielding and Grounding under Industrial Conditions
Page
B
B.1 What is ESD?
Definition:
B.2 Electrostatic Charging of Persons
Charging
B.3 General Protective Measures Against Electrostatic Discharge Damage
Ensure Sufficient Grounding
Avoid Direct Contact
Glossary
A
B
C
D
E
F
G
H
I
L
M
N
O
P
Page
R
S
Page
T
U
V
W
Index
A
B
C
D
H
I
L
M
N
R
S
T
W